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I don't know about that Schnarph, I only go through 3ml a day. I don't think that's a lot. I know people that go through that much in an hour. I've noticed a weird feeling in my lungs too since I went to 60vg/40pg.
I have been vaping 100% VG for months with no issues. I just started taking that down to 90% VG a couple of weeks ago with no noticeable difference. YMMV doesn't come close to describing this situation.
The heavy lung feeling might have something to do with how much you vape in a day. Maybe it's the VG or possibly something else. Best stay on the safe side and stop doing whatever it was that coincided with the lung problems.
This reminds me of a bad one liner (paraphrased): I told my doctor "it hurts when I do this", and he said "don't do that"
I don't know about that Schnarph, I only go through 3ml a day. I don't think that's a lot. I know people that go through that much in an hour. I've noticed a weird feeling in my lungs too since I went to 60vg/40pg.